hub problem - Ford Powerstroke Diesel Forum
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post #1 of 16 Old 02-10-2010, 04:17 AM Thread Starter
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hub problem

i have the switch on the fly 4X4 and my auto locking bubs do not work, but i can still lock the hubs in and get 4X4, i've seen that there are o-rings on the hub, or is the actual hub goig bad?

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post #2 of 16 Old 02-10-2010, 05:08 AM
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I know my 01 has the vacccum operated lock in hubs,,,, I put in Warn manuals. I wonder if your vac is whacked or a line is kinked/broken,came unconnected ? Does your Vac pump run more than normal?

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post #3 of 16 Old 02-10-2010, 05:27 AM
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Probably a vacuum leak, the wheel seal leaking or a hose off. Seems from what I've read that if you want 100% reliability then you have to go to warn manual hubs and give up the SOF idea. My wheel seals are shot and when I turn the switch my AC goes into defrost mode, a sure sign of a vacuum leak somewhere.
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post #4 of 16 Old 02-10-2010, 06:11 AM
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if they work when u lock them you have a vac leak like 99% of us it seems....could be a split line, could be a bad vac pump
check lines going to hubs in fenders and check line that hangs down in passanger footwell up into behind glove box for any obvious disconnections, or split or broken lines..

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post #5 of 16 Old 02-10-2010, 07:25 AM Thread Starter
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alright ill have to check after the snow is done, thank you guys

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post #6 of 16 Old 02-10-2010, 07:50 AM
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Simple fix. Take under $200, get yourself a set of Warn manual hubs, take the stock vac-craps off and throw in garbage, install Warn hubs. End of problem.
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post #7 of 16 Old 02-10-2010, 03:23 PM
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Or replace stopped up fitting at wheel and Save $200. There are several threads going on 4wd problems. Read all of them. Lots of info.
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post #8 of 16 Old 02-10-2010, 07:19 PM
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i didnt do anything with the vac line wen i installed hubs....i just figure it will be fine still connected even tho not functional....no??

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post #9 of 16 Old 02-11-2010, 02:18 AM Thread Starter
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is the vac line right on the back of the spindle?

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post #10 of 16 Old 02-11-2010, 10:24 AM
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Quote:
Originally Posted by tturbonegro View Post
i didnt do anything with the vac line wen i installed hubs....i just figure it will be fine still connected even tho not functional....no??
If your vac pump is not continously running, yer probably fine. I am still setup the same too. I did replace the vac seals in my hubs when I change out the hub assemblies due to bearing failure. I believe that if your seal is intact and the hoses are all ok, should not be a problem.

I will take mine off as close to the pump possible and capp them off later. No need to have a vac line down there if not needed, brush /sticks and junk could pull one of them off while muckking around.,

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